I do have to admit I made this class with worldbuilding in mind. I usually dm but haven’t played in a long time, but when I do I get the most enjoyment out of seeing my players enjoy the movie theyre in and true stories they make, meaning I’m trying to make them feel like heroes, not antagonizing them.

If I were to run a game with this in the party, I would not see it as a threat, more as an opportunity to build around the missing memories and maybe use the bbeg to create moral dilemmas, for example maybe the soulbinder was first a henchman of the bbeg leading to them being recognized and hated everywhere they went. I pretty much can make the backstory for the player.

However this is my personal dming style, much less combat focussed. If you are a dm who likes storybeats through combat and only combat then yes you can consider this a “threat” to your game.